I don't intend this to be offensive, but was wondering, does DS7 know why he doesn't finish ... esp. the 3 projects you mentioned "He has previously wrote a fiction story, created a constellation book, and made a poster about animal blood types"
What does he think about that? Just trying to see a bit more into perhaps his own reasoning...
Has he started to learn to type? I've read that gifted children who can think a lot find handwriting too slow of an output. Or perhaps help him type out everything he wants to say?
Just some initial thoughts... I'm sure someone else will have more ideas.